Apparatus for generating and controlling the generation of superheated steam.



R. H. WHITE. APPARATUS FOR GENERATING AND GONTRGLLING THE GENERATION OP SUPERHBATED STEAM.

APPLICATION FILED H0112 1906.

Patented M21128, 1911.

s SHEETS-SHEET 1 R. WHITE.

APPARATUS FOR GENERATING AND CONTROLLING THE GENERATION OI SUPERHEATED STEAM.

APPLIOATION FILED NOV. 12, 1906.

987,933,, fitsnted Mar. 28, 1911.

8 SHEETS-$HEET 2.

l I i R/H. WHITE. APPARATUS FOR GENERATING AND CONTROLLING THE GENERBTION OP SUPERHEATED STEAM. APPLICATION FILED NOV. 12, 1906.

987,933. Patented ar. 28, 1911.

3 SHEETSSHEET 3.

tlNlTEi) @TATEd PATENT @hlilflifi.

ROLLIN H. WHITE, OF OLE VELAND, GI-IIO, ASSIGNOR, I EY Ii/IESNE ASSIGNMENTS, TO THE WHITE CGMEANY, 0F CLEVELAND, OHIO, A CGRPORATION OF OHIO.

APPARATUS FOR GENERATING AND CQNTROLLING THE GENERATION OF SUI ERHEATED STEAM.

Specification of Letters Patent. v

Patented Mar. 28, 19%

Application filed. November 12, 1906. Serial No. 342,973.

To all whom it may concern:

Be it known that I, RoLLi'N H. VVHM'E, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in :rpparatus for form condition as to pressure and temper-a ture. It is not intended, however, that this patent shall be limited to the use above stated, for which the specific embodimentot the invention shown is especially contrived; because it may be used with good results in any analogous situation wherein the capacity of the feed water forcing device is variable, and wherein the demand. for steam is not proportionate to the varying capacity of the feed water forcing device- The specific eml'iodin'icnt oi": the invention shown is, moreover, contrived with special reference to its use in connection with a. generator of the semi-flasher type, such as is in common use in the White steam cars, and is exemplified in Letter; Patent No. 650,837, griiuited Oct. 16, 1901. This patent is intended to cover the invention, when used in connection with that orany other type of generator with which it is adapted to be used.

The lIUGlltlOll, as shown, is also contrived with special reference to adapting it to use liquid fuel, which is to be forced to the burner by pressure in the containing .tank; but it is not-intended to limit the claims to an apparatus in which liquid fuel is used or is so supplied to the burner.

This apparatus is a very good apparatus with which to carry into effect a. process for generating and controlling the generation of supcrl'icated steam which forms the sub jccimatter of another application-filed conteinporaneously with this one.

The invention, which is hereinafter described and. shown in the drawings, may be here summarized as consisting or the COIIlbl" notions of parts as definitely pointed out in the claims. 7

In the drawing, Figure 1 is a diagramniatic view of an apparatus embodying the invei'ition in the best form now known to me. l 'ig. 2 is a longitudinal sectional view of a. How motor, which forms part of the apparatus. and of certain valves which are operated thereby. Fig. 3 is a transverse st rional view in the plane of line 33 of .l ig. 2. Fig. 4: is a'longitudinal sectional view through a part of one of the generator tudinal section of the water valve casing H.

The apparatus includes, of course, a generator A, which is preferably. of what is sometimes known as the semi-flash type.

Such a generator is, as before stated, shown in the Letters Patent No. 659,837, above mentioned,-thc essential characteristics of suchgenerator being that it consists of a plurality of connected coils of pipe into which water is introduced at a point remote from the tire, and wherein the Water travels tl'irough said coils gradually approaching the tire, being transformed into steam at some intermediate point therein and subsequently superheated before it leaves suid coils. The apparatus also includes a steam engine 13, which is to be supplied with steam from the generator, as, for example, through a pipe 6. The apparatus also includes a feed water pumpl) which is driven by the engine, and whose capacity, therefore, is

proportioned to the speed of the engine.

Consequently when the apparatus is used upon a steam driven vehicle, which travels at varying speeds, the capacity of the pump is proportionate to the rate at which the ve liicle is traveling. This pinup/may be driven :trmnthe crank shaft. Z1 of the engins; and it may draw the water which it throws from a tank E. The apparatus also includes a Water valve whose position is controlled by the pressure of steam in the generator. This valve iindits casing, in a very satisfactory form for the intended use, is shown in Fig. 5. It includes a casing H nected by a small pipe b with across which a diaphragm /L/ is secured. I structed as a by-pass around the How motor.

Steam at the generator pressure is admitted In this casing a valve which controls the to the casing on one side of this diaph 'agm. t

On the other side of the diaphragm is a chamber through which water will tlow.

when the valve is open. In this chamber is a spring-pressed piston IL: which engages 7 p I Cltlhtl tor operating this valve so that it W'lll with the diaphragm and may be moved thereby in opposition to its spring. This i lever /L, which inturn, I

piston actuatcs a actuates a valve it and this valve controls the flow of water through the casing. The valve casing It preferably connected in a by pass (Z around the pump;

the steam p e I). When the pressure of steam exceeds a reiflctermincd pressure the valve will be opened, and thereby permit all of the water which the pump is throwing to be diverted from the generator and by-passed to the other side oi the pump. When the steam pressure in the generator fails a little below the predetermined pressure this water valve 'will be closed, and thereby all of the water thrown by the pump will he requircd to pass toward the generator.

F represents the pipe l ading iroin the pump toward the generator. lit a suitable point this pipe is branched, forming thcreby the two branches, one indicated by M, M and one by N, N. In the branch 31'. iii a flow motor R is connected. The specilic construction of a suitable llow .motor will be subsequently described. It will he sullicient' for the present purpose to say that it is an apparatus containing a movable member whose position depends upon the rate of flow of the water through said how motor. The water as itemerges from said tlow motor goes to the generator througlra pi'pe M.

The generator is to be heated by a burner C of any suitable construction, which receives its supply oi. fluid fuel from a tank (i; and the fuel may be forced from the tank to the burner by the air pressure within said tank. The fuel flows from this tank through pipe O into a valve casing l, which COlltdlIlS a valve tor controlling then'atc oiflow of the fuel through the said we (as-- ing, and thence through pipe 0 to the burner. This valve is connected with the movable member of the flow motor so as to be closed or opened more ,or less thereby, and preferably it is to he sinconstructed and connected with the 1110\ able member of the flow motor, that the ratio between the rate at which fuel will flow through the valve casing P to the burner, and the rate at which water will flow through the low motor to the generator will remain constant, however "much the actual volumes of such fuel or water,.flowingduring a given period, may

'be increased on diminishe l.

A valve casing T is connected in the branch feed water pipe .t h", which is conand is also con t i l l l l rate at which water may flow to the gencrater through the conduit of which said valve casing and the pipe N are parts. A thermostat, which is snlnected to the inl'luence of the steam in the generator 15 promove the-valve away from its seat as the temperature of the steam increases, andvvill move it toward its seat as the temperature oil the steam decreases. This valve and the thermostat should be so arranged that, under average conditions, this valve permits about: one-third of the waterwhich flows into the generator to flow through the con duit 0'! which the valve casing T is a part, while about two thirds of said water will flow to the generator through that conduit of which the-flow motor is a part.

Before describing the operation of the described mechanism in the carrying out of the process herein claimed, it will be Well to first describe the construction of the flow motor and of the valves which it controls, in the 'fOlTltill which these parts are shown in the drawing.

.The flow motor includes a casing R having an inlet '1' near one end and an outlet r near the other end. Within the casing is a piston 1* which occupies aposition between said inlet and said outlet, and is subject to the influence of a spring 1' thrusting it towa 'd the inlet end of said casing. Within the "using is a restricted passage 1' through which water may flow past. the piston, irrespective of the position of the piston, in going itrom the inlet to the outlet. When water is forced into the casing through the iiilet r the piston will be moved in opposition to its spring. The higher the rate at which the water is forced into the casing, the more rapidly will the water flow past the piston through said. restricted passage; and, as the result of the increased pressure upon the piswhich is that shown in Fig. 1. The movement of the piston from its normal position will therefore be substantially proportionate to the rate at which water flows through the casing-past. said piston. I

lu the upper end of the casing is a relief port 1- which is connected by a pipe X with the water tank E. lhis relief port is n0rmall closed by a self-closing valve, prefen ably a spring-actuated valve '9=,the stem of which passes loosely through a nut 7 which is screwed into the upper end of the hollow stem 1- of piston 2- and a nnt'r is secured on the lower end of said'stenn When water is being.- forced iiito this casing at a rate irreaterthan the capacity of the generator, "the piston rwill be moved far enough to draw \nilYgJ-flOiii its seat. and therebypercasing P Jvith one arm of the lever 6.

cause casing R. It contains a port 71 through.

which fluid must flow in passing from pipe U to 'ipe U. The stem of a ValWi 1 2" passes through this port and out of the through a suitable stufling box, and its appe end is adju'stably secured to the piston stern r by being screwed into said stem a suitable distance. The spring r will, therefore, not only move the piston r toward the inlet end of the flow motor casing, but it will also draw the conical Valve 22 against its seat. The adjustable connection between the valve stem p and the dew motor piston is for the purpose,-among others, of regulating the tension "of the spring r Just above the port 79, the valve stem p is gradually reduced in cross sectional area, so that the farther it ismoved down in said port, the larger will be the opening in said port through which fuel may flow from the tank G to the burner through thepipes O, O. This reduction in the cross sectional area of the valve stem is of such character that the rate of How which is thereby permitted through the port will be increased in proportion to the distance which said valve stem is n'ioved down by the action of the flow 1notor piston.

The valve casing T, and the valve therein, and the thermostat which is provided for operating itwill now be described.

The valve casing is provided with an inlet 6 and an outlet i. whose valve stem t carries an adjustable shoulder 6 Within the casing is a bell. cranl: lever i, one arm of which engages below the shoulder 5 so that the valve may be raised from its seat. A spring actuated plunger t acts always upon this lever t, pushing it in the direction to so raise said valve. The movement of the lever in this direction is limited, and it is moved in the opposite direction by means of a thern'lostat W. This thermostat consists of an outer tube '10 which is made of metal, wherefore, it will be elongated as it is heated. This outer tube is contained in a tube Y which is connected in the generator coils and forms a part of the generator, near the outlet end thereof. The inner end of the tube in is closed, and the outer end is firmly secured to the valve casing T, and is opened to the in terior of said valve casing. lVithin the tube to is a rod to, which is made of practically non-expansible material, for example, glass or porcelain. One end of this rod abuts the inner end of the tube w, while its other end, projecting into the valve casing, engages It is evident,

.therefore, that as the steam in tube"Y gets hotter, the tube gets longer, and therefore It also contains a valve-[ the desired the lever may be moved a greater distance by the spring actuated plunger (6. This results in a wider opening of the valve 15 and this, as before explained, permits the water to flow to the generator at a higher rate through that conduit of which the valve casing T is a part.

This apparatusis, as before stated, of especial value when applied for controlling the generation of steam ona steam driven mo tor car; the reason being that on such a ve- I hicle any feed water forcing apparatus which is driven by the vehicle motor will vary in capacity as the speed of the vehicle and its motor varies; whereas. the demand upon the apparatus for steam is not at all proportionate to the speed of the motor. For example, if the vehicle be running at 1.5 miles an hour, the demand for steam for the purpose of maintaining that speed will be very much less than it would be if the vehicle were on an up grade orgoing through sand or mud; and on the other hand it will be very much less than if the vehicle were on a down grade of a smooth surface road Moreoverit is desirable, and. sometimes sential that the generator shall be working to its full capacity even when the car is going slowly, as for example when the car is going up hill or over a partic ilarly bad road. As a result of much consideration and experimenting, it is thought that the various parts of the apparatus,when used upon a motor car, should be so constructed and adjusted that the capacity of the pump, when the'vehicle is going at about 15 miles an hour, should be equal to the capacity of the generator. It is also quite apparent that it is unwise to deliver water to a generator of this character at a rate, beyond its capacity to transform it into superheated steam of degree of superheat. The purpose of a relief valve or itsequivalent is therefore apparent. It is for the purpose of diverting from the generator so much of the water thrown by the pump as is in excess 4 of the capacity of the generator to transform into superheated steam of the required pressure and tcumerature; and it and the flow motor should be so constructed and connected that when the speed oi the vehicle exceeds 15 miles per hour the relief valve will be opened so as to permit all of the water thrown by the pump-in excess of the capacity of the generator to be by-passed or returned to the water tank. It is apparent that the speed of the car mentioned, to wit, 15 miles per hour is arbitrarily selected; but some speed must be determined upon and the apparatus must be adjusted with regard to that speed, so that the process shall be efficient. i

It is evident from the description of the apparatus, that, if the speed of the vehicle is less than the speed determined upon at which it is desired to'have the generator receive water to its full capacity, for example, 15 miles per hour, a further reduction in the speed of the vehicle will reduce the speed of the pump, and thereby, the supthrown by the pump will be bypassed.

lVhen the pressure in the generator falls below the desired pressure the water valve will be closed, and thereafter all of the water thrown. by the pump will be forced toward the generator. frequency of the periods of time when all of the water is b v-passed or none of it is lay-passed by this watpr valve, play a very lar 'e part in determining the volume of water actually supplied to the generator during a given time. It isonly when the water is not by-pussed by this valve that the other parts of the described regulating apparatus act at all. \Vhcn they are opcrating, however, they operate after the following fashion.

If the c: is going more than 15 miles an hour, or whatever may be the rate for which the apparatus is adjusted, the quantity of water forced by the pump will be greater than the capacity of the generator. All of the excess above the capacity of the generator, will, however, be discharged from the llow motor casing through the relief opening therein. Water equal to the capacity of the g aerator will be lowing thereto through "the two conduits described-that is to say,'under what may be called the balanced condition of the apparatus, about two-thirds of it will he llowing through the conduit of which the llov. motor is a part, and about one-thi d of it will be howing througr h the conduit whose capacity is contralled by the thermostatically operated valve. The 1'( altant movement of the piston of the llou Motor, due to the passage of this water tlzrough said motor, will have opened the fuel valve so that the fuel will flow to the burner at amiroxin'iately the rate required to transform into superheated steam all of thewater which flows into the generator. Butit seldom, if ever, happens that the ratio bet-\vct-n the 'ater supply to the' generator and the fuel supply to the burner is exactly right. One or the other is in the excess and it is for the purpose of alternating these excesses at proper intervals The duration and and of confining them within small limits that the thermostat is provided. If, for ex ample, when the pump is throwing water at a rate below the capacity of the generator (as when the car is traveling at fifteen miles or less per hour) the temperature of the steam rises above the required temperature, it is because the rate at which fuel is sup plied to the burner is too great for the rate at which water is then being supplied to the generator. The result will be that the thermostat will move the valve which it controls farther from its seat, so that a greater volume of water will be delivered to the generator through that condult of which valve casing T is a part. But if the car is going at such speed that the water thrown by the pump is above the capacity of the gene 'ator, the rate at which water is flowing through the other conduit; will not, however, be changed, nor will the rate at which fuel is being delivered into the burner, be' cause there is never any change in the ratio between the rate at which Water is flowing into the generator through that conduit of which the flow motor is a part. In other words, the readjustment of the proportions of water and fuel will be brought.- aboutloy increasing the rate at which water is delivercd to the generator without increasing the rate at which fuel is delivered to the burner. If, however, whenthe car is traveling at the rate of 15 miles per hour or greater, the burner is not delivering heat enough to take care of the water being delivered into the enerator the tem )erature D 7 of the steam therein will be reduced, and the thermostat will operate in the other direction, and will force the valve which itcontrols, toward its seat, and-thereby will reduce the-quantity of water passing to the generator through the conduit whose capacit y is controlled by said valve. The quantity of the water llowing to the generatorthrough the other conduit, which includes the [low motor, will not he changed, however, and thereit'ore the quantity of fuel being fed to the burner will not be changed. in other words, the readjustment will be brought about by decreasing the quantity of water delivered to the generator without decreasing the quantity of fuel delivered to the burner. If, however, the speed of the "ar be reduced to less than '15 miles an hour. that the capacity of the pump is not equal to the ca 'iacity of the generator, a slightly different action of the apparatus will take place, but-with substantially the same results. in. the first place, the amountof water flowing through the flow motor may be decyeascd without at the same time decreasing at all the rate of llow of water through the thermostatically controlled valve casing. This will, of course. cause a change in the position of the tlovv mo tor Diston, and a consequent change in the posi tion of the fuel valve, so that temporarily too little fuel will be fed to the burner. The result of this will be a reduction in the temperature of the steam. -This will operate the thermostatin the direction which will cause the valve to move toward its seat, and thereby reduce the quantity of water iipwing past it. Since the total quantity 0 "avatar delivered into the generator is not thereby reduced, it is obvious that the quanmy of water flowing through the flow motor will be correspondingly increased, and this will d awthe fuel valve farther open and so increase the supply of fuel to the burner. This is also the manner in which the device is readjusted, if the car is running below 15 miles per hour, and the apparatus is thrown out of balance by any of the conditions which may arise. That is to say, the rate of flow of water to the generator is not changed, but there is a change in the ratio between the rateat which the water flows through the flow motor, and the rate at whiclrit flows through the thermostatically controlled valve, and these changes, which are due to the action of the thermosttrtresuit in changing the rate at which fuel is fed to the burner, without there being any change in the rate at which water is supplied to the generator.

It will be seen from the foregoing that, the variations in the demand for steam are taken care of by either bypassing all of the water thrown by the pump, or none of it, and by automatically changing the duration and frequency of these periods of time in which water is so lay-passed, or is not. All of these matters are dependent upon changes in the pressure of steam. The maintenance of a proper average ratio between fuel and water so as to vaporize the water discharged into the generator and to superheat it to the required degree accomplished by means of variations in the temperature of the steam, which, while it does not cause the change in ratio between the rate at which water is flowing to the generator through one conduit, vii: that containing the flow motor, and the rate at which fuel is flowing to the burner, does-cause a change in the ratio between the water flowing to the generator through the. two conduits,prnsided for that purpose, and consequently does change the ratio between the total volume of watei supplied to the generator and the volume of fuel supplied to the burner during; the same period, and all-water in excess of the capacity of the generator is diverted therefrom and returned to the water tank.

it will also be understood that the de scribed apparatus is" not organized with a view of maintaining any definite ratio hetwoen the rateat which fuelqis fed to the burner, and water fed to the, generator, or

between either of those rates and the rate at which steam is withdrawn from the ator. The ratios between these rates is constantly changing. The apparatus is organized to operate on the principle of rapidly alternating excesses and deficiencies inthe rate of supplying water and fuel, relative to each other and to the volume of steam Withdrawn, and for changing these ratios with such rapidity, and confining the changes to such narrow limits, that the p actical result is the maintenance of substantial uniformity of steam pressure and temperature irrespective of variations in demand for steam. The thermostat is almost constantly in operation when the water valve H is closed, thereby alternating the excess of fuel and water relatively to each other. When the water is in excess of the fuel the temperature of the steam goes down quickly, the thermostat acts to so change the ratio that for the time being fuel will be in excess. This results in a quick raising the temperature of he steam, whereupon the thermostat again acts to change the ratio with the result that for the time beingwater will be supplied in excess; i Vhen, any water is going into the generator, as when water *alve H is closed, that water is in excess of that quantity which is required to replace the steam with drawn duringthe same period. Fi hen no wateris going into the'generator, as when water valve it is open, obviously, the water supply is less than the quantity required to replace the steam which is withdrawn from the generator during that time. l i' hcn no water is flowing past the water valve Ii, none goes through the flow regulator, and therefore the-flow of fuel is reduced to the minimum, and the fire is practically out; in other words, during the time when no water is being supplied to the generator an insutlicicn'tquantity of fuel is being fed to the burner for the generation and suporheating of enough steam to take the place of that withdrawn from the generator during saidperiods.

Having" described my invention, i claim:

1. in an apiparatus for generating steam, the combination of a generator of the type specified, a burner for heating the generator. a feed water pump whose ciiicicncy varies dire-c v as its speed varies, and whose capacity, when running at less than its nnaXiuium speed is equal to the capacity of the generator, means for positivcly driviiug said pump at varying speeds and cans i it to deliver feed water generally in c nit regardless of the requirements mt the acniuator, means whereby, when the speed of the pump is such that it forces toward the generator water inexcess ot' the capacity of the generator, the excess water aut uimtically diverted from said gnuicrator', anduncans for :uitomatically supgenerthe type specified, a motor plying to the burner the fuel which is required to transform into superheated steam of the required degree of superheat all of the water supplied to the generator.

2. In an apparatus for generating-and using steam, the combination of a generator of supplied thereby, a burner for heating the generator, a feed water pump whose elticiency variesdirectly as its speed varies, and whose capacity, when running at less than its maximum speed, is equal to the capacity of the genera? tor, operative ceni'iections between the pump and the motor whereby the speed of the pump will be 1')i'oportioi1at.e to the speed of he motor, means whereby, when the speed of the pump is such that it forces toward the generator water in excess of the capacity of the generator, the excess water automatically diverted from said generator, and ll'ltilllS for automatically supplying to the burner the fuel which is required to transterm into suprrluated steam oi the required degree ot sxuaerheat all of the water sup plied to the generator.

In an apparatus lor generating and using steam, the continuation of a generator, ol' the type specified, a burner for heatingthe generator, a l'eed water pump whose capacity when running at less than the maximum speed is equal to the capacity of the generator, means for driving said pump at varying speeds, means whereby, when the speed of the pump is such that it forces to ward the generator water in excess of the capacity of the generator, the excess water is automatically diverted from said generator, means for automatically supplying to the burner the fuel. which is required to transform into superheated steam of the required degree of superheat all of the water supplied to the generator, and means, governed by the pressure of steam in the generator, for alternately by-passing all of the water thrown by the pump or allowing it all to go to the generator, and for varying the frequency and duration of the periods of time during which the water is or is not so by-nassed.

t. In an apparatus for, generating and using steam, the combination of a generator, of the type specimen, a motorsu'pplied thereby, a burner for heating the generator, a feed water pump whose capacity when running at less than the maximum speed is equal to the capacity of the generator, 0nerative connections between the pump and the motor whereby the speed of the pump will be proportionate to the speed of the motor, means whereby, when the speed of the pump is such that it forces toward the generator water in excess of the capacity of the generator, the excess water is automatically divertcd from said generator, means for automatimeans governed by the.

eally supplying to the burner the fuel which is required to transform into superheated steam of-the required degree of superheat all of the water supplied to the generator, and means, governed by the pressure 0 steam in the generator, for alternately bypassing all of the water thrown by the pump or allowing it'all to go to the generator, and for varying the frequency and duration of the periods of time during which the water is or is not so by-passed.

5. In an apparatus for generating and using superheated steam, the combination of a steam generator, a burner for heating the generator,- and a feed water pump, two conduits through which the water thrown by the pump may pass to the generator, a flow motor connected in one oi said conduits, means governed by saidfiow motor for determining the rate at which fuel shall be supplied to the burner, means governed by the temperature oi? the steam for varying the rate at which water is supplied to the generator through the other conduit.

(5. In an apparatus for generating and using superheated steam, the combination of asteam generator, a burner for heating the generator, and a feed water pump,means tor driving said pump at yarying speeds, two conduits through which the water thrown by the pump may pass to the generator, a flow motor connected in one of said conduits, means governed by said flow motor for determining the rate at which fuel shall be suppliechto the burner, means governed by the temperature of the steam for varying the rate at which water is supplied to the generator through the other conduit, and means governed by the pressure of steam for alternately bypassing thrown by the pump or for allowing it all to go to said two conduits and for varying the duration and frequency of the periods of time in which the water is or is not so bypassed.

7. In an apparatus for generating and using superheated steam, the combination of a steam generator, a steam mot-or supplied thereby, a burner! for heating the generator, and a feed water lpump which is operatively connected with .said motor, two conduits through which the water thrown by the pump may pass to the generator, a flow motor connected in one of said conduits, means governed by said flow motor for determining the rate at which fuel shall be supplied to the burner, means governed by the temperature of the steam for varying all of the water therate at which water is supplied to the generator through the other conduit, and pressure of steam for alternately by-passing all of the water thrown by the pump or for allowing it all to go to saidtwo conduits and for varying 1 [the duration and" freiiuency of the periods of time in which the by-passed.

8.- In an apparatuslfor generating and; uslng steam, the combinationgof a steam 2 generator of the type specified, a burnerfor heating the, same, a steam engine: supplied" v by the generator and adaptedfto bdrun at various speeds, a' feedwater'pump driven by said motor at speeds which ate-proportionate to the speeds of .the motor said pump less than its maximum speed, twofeed waterconduits through which feed water may be verting from the generator so much of the having-5a capacity equal to the capaolty of the gener ator when the pump is run'ning at forced by the pump to the'generator, a flow motor connected 1-none of said conduits, means governed by the flow motor for regulating the rate at which fuel is delivered to the burner, means for automatically diwater forced by the pump as is in excess of the capacity of the generator, means governed by the 'temperature of thesteam for varying the rate 01''- flow of the Water to the generator through the other-feed Water con: iduit. 9/Ina steam motor car, the combination of a steam generator-,a burner for beating the same, a steam engine supplied bythe generator for driving the car at various speeds, a feed water pump driven by said water is or is not so motor at speeds which are proportionate to ing' a capacity equal to the capacity of the generator when the pump is running at less than its maximum speed, two feed water the speeds of the motor and consequently to the rate of travel of the car, said pump havconduits through which feed water may beforced by the pump to the generator, a flow motor connected in one of said conduits,

means governed by the flow motor for regulatingthe rate at which fuel is delivered to the. burner, means for automatically diverting from the generator so much of the Water forced by the pump as is in excess of the capacity'of the generator, means governed during which the Water is or is not'so byv passed.

In'test-imony whereof, I hereunto aflix my signature in the presence of two witnesses.

2 Witnesses: E. B.Gn;oHR IsT, H. R. SULLIVAN;

ROLLIN H. WHITE. 

